“Contrails (short for “condensation trails”) or vapour trails are artificial clouds that are the visible trails of condensed water vapour made by the exhaust of aircraft engines. As the hot exhaust gases cool in the surrounding air they may precipitate a cloud of microscopic water droplets or, if the air is cold enough, tiny ice crystals”. – Wikipedia

Photo: An airplane leaves a vapor trail as it flies in front of he moon on January 17, 2007 above Hanover, Germany. (Photo by Alexander Hassenstein/Getty Images)

A Polish MiG-29 flies beneath dark skies at the annual RNAS Yeovilton Air Day on July 9, 2011 in Yeovil, England. The annual air day at RNAS Yeovilton in Somerset, attracts over 35,000 people to what is one of the biggest air shows in the region and gives visitors the chance to see a host of aircraft as well as a number of historic and classic cars. (Photo by Matt Cardy/Getty Images)

A Los Angeles County Fire helicopter flies over during the “Skirball Fire” which began early morning in Bel-Air, California, USA, 06 December 2017. An outbreak of several fires North of Los Angeles has occurred as one of the strongest Santa Ana winds forecast of the season is ongoing and expected to last several days. (Photo by John Cetrino/EPA/EFE)

A butterfly flies into the jaws of a crocodile inhabiting the Tarcoles River, the most polluted basin in Central America and one of the most polluted in Latin America, in the place of Tarcoles, province of Puntarenas, Costa Rica, 05 June 2018. Costa Rica, a country recognized worldwide for its environmental policies, seeks to be a leader in the replacement of single-use plastic with renewable and compostable alternatives, despite its lag in terms of recycling and integrated waste management. (Photo by Jeffrey Arguedas/EPA/EFE)

A P-51 Mustang named “Charlotte's Chariot” from the Southern Heritage Air Foundation flies past a cloud of smoke and fire from a nearby battle reenactment during the Wings Over Houston Airshow in Houston, on Saturday, November 1, 2014. Battle reenactments are part of the yearly show held at Ellington Airport. (Photo by Kar Hlava/AP Photo/Bay Area Citizen)

A meteorite of the swarm of meteorites Perseida flies above the Ujudvar TV Tower as seen from Ujudvar, Hungary, late Friday, August 13, 2021. Perseidas, one of the brightest meteorite swarms, consist of a multitude of stellar particles which due to their high speed glow up and burn by entering Earth's atmosphere. (Photo by Gyorgy Varga/MTI via AP Photo)

Volunteers care for burned sheeps in a field hospital established by HAYTAP (The Federation of the Animals Rights in Turkey) for animals after a wildfire at the Manavgat district of Antalya, Turkey, 09 August 2021. It is not known how many wild animals living in the forest died in the fires, but about 33,000 farm animals perished. About 30 veterinarians and hundreds of volunteers work around the clock at the field hospital. Sheep, covered in mosquito nets to protect their wounds from flies, lay there in the shade trying to recover, and various animals such as cats, dogs, owls, and cows have been treated or are still being treated there. (Photo by Erdem Sahin/EPA/EFE)

Nature – first prize, stories. Pandemic Pigeons – A Love Story. The photographer’s daughter, Merel, cowers after Dollie flies past and perches on the balcony before entering the house in Vlaardingen in the Netherlands on 6 April 2020. “She’s still frightened when Dollie suddenly lands on the balcony railing. I hide my smile behind the camera, as I try to comfort her by saying they won’t hurt you. “I thought he was going to attack me”, she replies. As the nesting pigeons keep coming back to our place, slowly my girls have started to appreciate them – perhaps not as much as I do, but it’s a start”. (Photo by Jasper Doest/World Press Photo 2021)